diff --git a/designer-base/src/main/java/com/fr/design/formula/FunctionConstants.java b/designer-base/src/main/java/com/fr/design/formula/FunctionConstants.java
index 17e61b5e9f..1c974b906a 100644
--- a/designer-base/src/main/java/com/fr/design/formula/FunctionConstants.java
+++ b/designer-base/src/main/java/com/fr/design/formula/FunctionConstants.java
@@ -58,6 +58,7 @@ public final class FunctionConstants {
 	public static FunctionGroup ALL = getAllFunctionGroup();
 	public static List<String> abandonFormulas = Arrays.asList("CIRCULAR", "CROSSLAYERTOTAL", "HIERARCHY", "LAYERTOTAL");
 	public static NameAndFunctionList NEW = getNewFunctionList();
+	private static List<String> shieldedFormulas = Arrays.asList("ENBYSTRNUM","TEXTGETNUM" ,"GETCHARNUM","GCD", "LCM");
 
 	static {
 		loadEmbededFunctions();
@@ -102,7 +103,7 @@ public final class FunctionConstants {
 					if (StableUtils.classInstanceOf(cls, iface)) {
 						Function inst;
 						inst = (Function) cls.newInstance();
-						if (abandonFormulas.contains(inst.getClass().getSimpleName())) {
+						if (abandonFormulas.contains(inst.getClass().getSimpleName()) || shieldedFormulas.contains(inst.getClass().getSimpleName()) {
 							continue;
 						}
 						for (NameAndTypeAndFunctionList EMBFUNCTION : EMBFUNCTIONS) {